Income Taxes - Additional Information (Detail)	0 Months Ended	12 Months Ended																			12 Months Ended				12 Months Ended			12 Months Ended
	Nov. 30, 2010	Dec. 31, 2014 USD ($) Y	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Apr. 30, 2012 USD ($)	Dec. 31, 2011 USD ($)	Jul. 31, 2011 USD ($)	Jul. 31, 2011 MOP	Dec. 31, 2014 Minimum USD ($)	Dec. 31, 2014 Maximum USD ($)	Dec. 31, 2014 Tax Credit Carryforward Expiry In 2018 USD ($)	Dec. 31, 2014 Tax Credit Carryforward Expiry In 2019 USD ($)	Dec. 31, 2014 Tax Credit Carryforward Expiry In 2020 USD ($)	Dec. 31, 2014 Tax Credit Carryforward Expiry In 2021 USD ($)	Dec. 31, 2014 Tax Credit Carryforward Expiry In 2023 USD ($)	Dec. 31, 2014 Tax Credit Carryforward Expiry In 2024 USD ($)	Dec. 31, 2014 Foreign Tax Credit USD ($)	Dec. 31, 2013 Foreign Tax Credit USD ($)	Dec. 31, 2014 Other Deferred Tax Asset USD ($)	Dec. 31, 2013 Other Deferred Tax Asset USD ($)	Dec. 31, 2014 Wynn Macau USD ($)	Dec. 31, 2013 Wynn Macau USD ($)	Dec. 31, 2012 Foreign Tax Credit Carryforwards USD ($)	Dec. 31, 2012 General Business Tax Carryforwards USD ($)	Dec. 31, 2014 Foreign USD ($)	Dec. 31, 2013 Foreign USD ($)	Dec. 31, 2012 Foreign USD ($)	Dec. 31, 2014 U.S. USD ($)	Dec. 31, 2013 U.S. USD ($)
Income Taxes
Complementary tax rate	12.00%
Amount of complementary tax exemption		$ 99,400,000	$ 107,300,000	$ 87,100,000
Amount of complementary tax exemption per share		$ 0.98	$ 1.06	$ 0.84
Annual complementary tax to be paid		1,900,000	1,900,000	1,900,000			1,900,000	15,500,000
Gaming tax																									35.00%
Tax credit of "net" foreign source income																												35.00%
Recognized foreign tax credit tax benefit net of valuation allowance		895,000,000	879,700,000
Increase in valuation allowance for deferred tax assets		709,800,000	755,500,000
Tax benefits realized		9,400,000	10,500,000	5,500,000
Foreign tax credit carryforwards		3,283,700,000									619,600,000	110,900,000	530,400,000	540,300,000	757,000,000	725,500,000												3,283,669,000	2,614,665,000
Tax loss carryforward																									59,600,000	75,000,000	79,100,000	0
U.S. capital loss carryforward incurred						3,600,000
Foreign tax credit carryforward time period, years		10
Valuation allowance																	3,242,100,000	2,542,800,000	6,900,000	5,800,000					47,800,000	38,400,000
Accumulated earnings to be repatriated		198,600,000
Undistributed earnings of foreign subsidiaries		412,100,000	388,100,000
Temporary differences resulting from earnings of certain non-U.S. subsidiaries		144,200,000	135,800,000
Repatriation of foreign earnings																					1,125,300,000	840,900,000
U.S. and foreign uncertain tax positions that increase NOL and foreign tax credit carryforward deferred tax assets		88,900,000	60,300,000	55,200,000
Uncertain tax positions, noncurrent		0	29,200,000	29,100,000
Unrecognized tax benefits that would impact the effective tax rate if recognized		20,700,000	20,700,000	18,800,000
Recognized interest and penalties		0	0	300,000
Unrecognized tax benefit increase resulting in tax settlements									0	600,000
Cash tax payment					1,300,000																		3,100,000	900,000
Decrease in unrecognized tax benefits due to expiration of the statute of limitations		$ 2,415,000	$ 3,105,000	$ 9,349,000																	$ 3,400,000